that is preference a lone. without knowing what is someones genre preference, sibilance tolerance, bass or midrange desires its hard to say one is better. They all have their strengths and weaknesses. I would say that in a lot of ways I do prefer them over it but make the he400 just a smidge smoother/easier on my ears, and give it some mids and I wouldnt even look at these if forced to choose.
Some flaws are like fatal flaws. The more you are here the more fatal the flaw becomes and the bigger the spec.
That is true. But what specifically you didn't like in the HE-400 ?